PHYSICAL REVIEW A
ATOMIC, MOLECULAR, AND OPTICAL PHYSICS
Editor
BERND CRASEMANN
(University of Oregon)
Associate Editors Senior Assistants to the Editor
LEE A. COLLINS Senior Assistant Editor DEBBIE BRODBAR
(Los Alamos MARGARET MALLOY MARGARET FOSTER
National Laboratory) VALERIE L. MILLER
JOANNA POPADIUK
LORENZO NARDUCCI
(Drexel University)
Editorial Assistant
STEPHEN J. SMITH GARY T. BEDFORD
(Joint Institute for
Laboratory Astrophysics)
Editorial Board
Term ending 31 December 1997 Term ending 31 December 1998 Terms ending 31 December 1999
K. BURNETT-atomic, molecular, L.J. CURTIS - atomic physics L.E. BALLENTINE-quantum theory
and optical W.R. JOHNSON-atomic theory B.-G. ENGLERT-quantum optics
H.J. CARMICHAEL-quantum optics P. MEYSTRE-quantum optics E.E. EYLER-atomic and
E. MERZBACHER-quantum theory T.N. RESCIGNO-molecular theory molecular physics
P.W. MILONNI-theoretical physics A.F. STARACE-atomic theory R. LOUDON-quantum optics
R.F. O'CONNELL-theoretical physics B. SCHUMACHER-quantum information
T.G. WINTER-atomic physics theory
W.K. WOOTTERS-quantum theory S. STENHOLM-quantum optics
A. ZEILINGER-quantum measurement
W.H. ZUREK-quantum theory
Published through the An online version of the journal is available. See our Web server for information,
American Institute of Physics or inquire at assocpub@aps.org. Manuscripts for publication should be submitted to
by the Editorial Office (please provide four copies). Information for contributors
may be found in the January and July issues. Submission is a representation that the
The American Physical Society manuscript has not been published previously and is not currently under consideration for publication
_________ elsewhere. A signed APS copyright-transfer form (to take effect upon publication)
must be provided, and should be included with the submission. The copyright-transfer
President form appears at the end of the 26 May 1997 issue of Physical Reveiw Letters and is avail-
D. ALLAN BROMLEY able on our Web server, via ftp to aps.org, or on request from the Editorial Office.
President-Elect
ANDREW M. SESSLER To support wide dissemination of research results through publication, the authors'
institutions are requested to pay a publication charge of $70 per page plus a $70
Vice-President abstract charge. For properly prepared electronic submissions, the request is $35
JEROME I. FRIEDMAN per page plus a $35 abstract charge. Acceptable formats are REVTeX (preferrred), LaTeX.
Harvmac, Plain TeX; PostScript figures. Reprints are offered for sale to authors.
Executive Officer Inquiries regarding subscriptions, renewals, address changes, missing or damaged
JUDY R. FRANZ copies, microfilm, and single-copy orders should be addressed as follows:
Treasurer Members: APS Membership Department, One Physics Ellipse, College Park, MD 20740-3844
THOMAS J. MCILRATH [phone: (301) 209-3280; FAX: (301) 209-0867; e-mail: membership@aps.org].
Editor-in-Chief
MARTIN BLUME Nonmembers: Circulation and Fulfillment Division, American Institute
_________ of Physics, 500 Sunnyside Blvd., Woodbury, NY 11797 [phone: (516) 576-2270,
(800) 344-6902; Fax: (516) 349-9704; e-mail subs@aip.org]. Allow at least
six-weeks advance notice. For address changes please send both old and
Editorial Office: new addresses, and, if possible, include an address stencil imprint from the
mailing wrapper of a recent issue. A change-of-address form is included in
1 Research Road every issue of Physics Today.
Box 9000
Ridge, NY 11961-9000
Telephone:(516)591-4010 The Annual Index of Physical Review and Physical Review Letters may be ordered.
World Wide Web server Back issues are available. There are mail surcharges for non-U.S. destinations.
http://publish.aps.org/ Physical Review A (ISSN: 1050-2947) is published once a month (on the 1st of each
Fax:* (516)591-4141 month) by The American Physical Society through the American Institute of Physics.
Internet:* pra@aps.org Periodicals postage rates are paid at Woodbury, NY 11797, and additional mailing
*Not for transmission of offices. POSTMASTER: Send address changes to Physical Review A, Circulation and
manuscripts Fulfillment Division, American Institute of Physics, 500 Sunnyside Blvd., Woodbury,
NY 11797.
Copyright 1997 by The American Physical Society
Permission to quote excerpts or to reprint any figures or tables should be
obtained directly from an author. The American Physical Society for its part
hereby grants permission to quote excerpts and reprint up to 25 figures and/or
tables from its journals with acknowledgment of the sources. Requests for
permission to reprint in one publication more than 25 figures and/or tables
from the totality of APS journals must be made in writing to the Associate
Publisher (see address below). A $10.00 fee per figure and/or table in excess of
25 will be charged.
Individual teachers, students, researchers, and libraries in non-profit institutions
acting for them are permitted to make hard copies of articles for use in teaching
or research, provided such copies are not sold.
Copying of articles for sale by document delivery services or suppliers, or beyond
the free copying allowed above, is permitted against payment of a copying fee. The
current copying fee is $10.00, per article, per copy. Express permission of APS
is not required, except for purposes stated below, provided that the fee is paid
For electronic submission through the Copyright Clearance Center, Inc. (CCC), 222 Rosewood Drive, Danvers,
of manuscripts use MA 01923. Contact the CCC for information on how to report copying and remit
pratex@aps.org payments.
Reproduction in a reprint collection, or for advertising for promotional purposes,
Production and distribution by or republication in any form requires permission of one of the authors and a
license from APS. Such a license must be sought from Mina Chung, Associate Publisher,
American Institute of Physics The American Physical Society, One Physics Ellipse, College Park, MD 20740-3844.
500 Sunnyside Blvd. Permission of the author must be sought and obtained from him or her directly.
Woodbury, NY 11797
Telephone:(516)576-2200
Fax:(516)349-1802
CODEN:PLRAAN
PRINTED IN USA